Knife for surgical purposes



FIG. 1 is a right side elevation view of a knife for surgical purposes showing our new design;

FIG. 2 is a left side elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a front elevation view thereof; and

FIG. 7 is a top, rear, and right side perspective view thereof.

The broken line showing of the text “pfmmedical” in the drawings illustrate portions of the knife that forms no part of the claimed design. 

CLAIM The ornamental design for a knife for surgical purposes, as shown and described. 